Homework Answers
| X1 | 16 | X2 | 23 | ||
| n1 | 26 | n2 | 55 | ||
| P1 | 0.61538 | X1/n1 | P2 | 0.418182 | X2/n2 |
| Pbar | 0.48148 | (X1+X2)/(n1+n2) | |||
| P1-P2 | 0.19720 |
99.9% Confidence interval:
| 99.9% CI | alpha | 0.001 |
| Zc | 3.290527 | Use Z table |
| ME | 0.382708 | Zc*SQRT(P1(1-P1)/n1+P2(1-P2)/n2) |
| Upper | 0.57991 | (P1-P2) + Zc*SQRT(P1(1-P1)/n1+P2(1-P2)/n2) |
| Lower | -0.1855 | (P1-P2) - Zc*SQRT(P1(1-P1)/n1+P2(1-P2)/n2) |
CI = (-0.186, 0.580)
-0.186 < P1-P2 < 0.580
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construct a confidence interval:
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7. Construct a confidence interval for p - P2 at the given level of confidence Xy = 399, n = 531, X2 = 444, n2 = 564, 99% confidence The researchers are % confident the difference between the two population proportions, P1-P2.is between and (Use ascending order. Type an integer or decimal rounded to three decimal places as needed.)
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